# Which number will come in place of the question mark in the following series: 3, 4, 3, 0, -5, -12, ?

+1 vote
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Which number will come in place of the question mark in the following series: 3, 4, 3, 0, -5, -12, ?
posted Dec 8, 2015

3
3+1= 4
4+1-2= 3
3+1-4= 0
0+1-6= -5
-5+1-8= -12
-12+1-10= -21

+1 vote

-21
Pattern: +1, -1, -3, -5, -7, -9...

answer Dec 13, 2015 by anonymous